Ah, I see; I was interpreting "a few crashes per day" as "a user will see a few crashes per day", which I understand now not to be the case. That being said, the sibling comment here suggesting that some crashes might not be reported is an interesting thing to think about, although I don't know nearly enough about mobile device to know how to tell if that's happening.

Or maybe 100 crashed, but only 10 made to report it.